Linux Could Not Resolve Host



If the output shows an answer section with an A (IPv4) record for the hostname, then Google Public DNS is able to resolve the name, but the host and/or its name server are not configured to return. PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist. Please make sure you have the correct access rights and the repository exists. And the body is "curl: (7) couldn't connect to host" I'm not sure what this cron job is supposed to be doing nor what host it's trying to connect to. I should've clarified: I'm trying to resolve the names of other clients connected to the VPN. Understanding host name resolution and DNS behavior in Java What can be simpler than resolving a host name to IP address? Whoever asks this question probably does not fully understand the details of the name resolution process. Both should use the same "Server" for resolving names, and give the same result. 04 w/ LAMP) about ~14 hours ago. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Increase visibility into IT operations to detect and resolve technical issues before they impact your business. This saved us a lot of time and after this I've reconfigured all my MySQL servers with skip-name-resolve parameter. The problamatic Pi-Hole is running Raspbian on a RPI2. For instance - if your DNS name that you provided does not match the DNS hostname on the Linux server, or match it's SSL certificate, or if you failed to export/import the SCX certificates for multiple management servers in the pool, you might see: Agent verification failed. Could not open connection to the host, on port 1523: Connect failed. We've been getting multiple reports lately that when trying to connect to Horizon View, random users are. Verify it like this:. However, now and then, there is an error; curl: (6) Couldn't resolve host 'ifconfig' I know the DNS server is up and running so why does this work and why does it not work at times?. This post quickly helps to resolve "bash: wget: command not found" error. Hi Stuart, Thanks for your replay. Use rpm query all command to check whether bind-utils package is installed on the server. I rebooted my server (Ubuntu 16. com', you can fix them manually by appending a couple of lines in one of the files in Ubuntu. When you say snapshot, I assume you mean a P2V of a Solaris host to a VM and not a VMware 'snapshot' which is something entirely different Did you convert this VM using VMware Converter into something VMware Player would understand using VMware Converter? Does the boot of the VM happen correctly? That is the first place I would look. Increase visibility into IT operations to detect and resolve technical issues before they impact your business. when I use curl as instructed by help doc, I always got "curl: (6) Could not resolve host: \". This will cause major issues when sending email. Further, how could it be that all unix/linux/windows/android hosts on the same network resolve the not-FQDN "server" just fine, but OSX does not? (iOS devices with 8. could not resolve the connect identifier specified. Unlimited DVR storage space. Verified that , the IP is added in the DNS also. I added the entry and the problem went away. I upgraded to Windows 10. Oracle Linux must not use the mere presence of a server on this address to indicate that it runs inside the Oracle Cloud. linux安装命令出错(could not resolve host mirrorlist. To list all available installation groups on Redhat 7 Linux use: [[email protected] Both described in one of my presentations on SlideShare and in Demos on DaDBm YouTube channel. Resolve or Dns. Hi, I just want to ask if there is any way to use the. com'" (Doc ID 2363725. After doing this, I still get email complaining unable to resolve host, apparently the cause is a DNS lookup (which indeed fails, as the host-command shows - DNS lookups do not consult /etc/hosts). 1 which is required to resolve internet entries but not enough to resolve SCAN settings via dnsmasq. Our mission is to put the power of computing and digital making into the hands of people all over the world. A centralized syslog server was one of the first true SysAdmin tasks that I was given as a Linux Administrator way back in 1997. [SOLVED] sudo:could not resolve host This, however, I can't figure out. org': Host not found (https://svn. Firefox says "Unable to connect". Dari: > Me comenzó a dar este problema cuando instalé wheezy, con squeeze no me > sucedía. If you are using Oracle Linux, then follow the configuration instructions on public-yum. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. OK, I Understand. Please note that excessive use of this feature could cause delays in getting specific content you are interested in. ifconfig its look emty not my ip its inet 127. Read this article to fix SQL Server error 53 - Could not open a connection on SQL Server (Microsoft SQL Server, Error : 53). edit the /etc/hosts file for every device in your LAN, see hosts(5) set up a DNS server to resolve your hostname and make the LAN devices use it (e. My problem is that I use URLs like confighost:reponame. conf does not have any nameservers, you can add this line somewhere in the file: nameserver 8. You may find you were writing [email protected] or something else similar, which would spit out this following error: ssh: Could not resolve hostname server: Name or service not known. Here is the simple fix to this problem; just add the following line into your MySQL configuration file and restart the server. Here the kind of error: yum install. " on the local host where the program is running, not by. It outputs “sudo:unable to resolve host Lily-desktop”(here assume current host-name is Lily-desktop), however the commands work as well as before. Could not resolve host などと表示された時の解決方法. [email protected] [~]# host -t A globedrill. 1-1, pacman(5. I am not positive if this will resolve the issue or not but you might want to give it a try. On client machine where Receiver is running, configure the DNS server to the Domain DNS server where Linux VDA resides in. The network path was not found. Error: Could not resolve host. Make sure to add the link IN THE ARTICLE, in the sections below. When I placed a test order, I get (Curl Error) Couldn't resolve host '' - code: 6 when trying to provision an account automatically. From a Linux box, I can run; # curl ifconfig which typically returns my public IP. Please check the name and try again. yml of the node is 10. However, now and then, there is an error; curl: (6) Couldn't resolve host 'ifconfig' I know the DNS server is up and running so why does this work and why does it not work at times?. When you're trying to connect to a service on Linux, "No route to host" is one of the last things that you want to hear. No cable box required. ssh/config file on Windows with msysgit installed. It’s a broad message that means that your computer can’t reach the target server. my host is Windows 7 with latest virtual box client is kali linux and mint 18 and mint 17 (i use all 3 of these) and when i try to restart network-manager service it never works (i mean the internet will not return until reboot) how can i fix this please?. Error: failed to update archlinuxfr (download library error)". Could not resolve host: github. You might also be interested in following article : 35 Practical Examples of Linux Find Command; 20 Netstat Commands for Linux Network Management. Once complete, it should automatically update. Im trying to connect to the new SAO server and it just says cant resolve host name and i know most people can get on and one other person is having this problem cna u please help me fix this? i checked the ip quite a few times but if it works tommorow witch it might becus the internet and cumputers and stuff like to be stuped like that ill say. TNS Issues when connecting to database with Forms Builder 12. So that the FQDN of the Linux VDA can be resolved. So, whatever you format in your /etc/hosts file will resolve accordingly in any network action on the Linux install. com -bash: host: command not found [email protected] [~]# rpm -qa | grep -i bind-utils [email protected] [~]# bind-utils package is not installed on the above server and that is the reason why host command shows not found. org; Unknown error This indicates that you either (a) don't have a properly configured DNS server or (b) your network configuration isn't correct and you can't connect to a DNS server to check the hostname mirrorlist. If the DNS server does not respond to the initial request for name resolution, the request is attempted again at 1, 2, 2, and 4 second intervals. Non-Interactive mode is used to query about information of a domain or host. Now if I double click the network icon, I don't see any machines except my local client laptop. 事象 CentOS7をインストールした直後、yum updateをかけようとするもどうやら名前解決ができてない様子。。。 解決策 vi /etc/resolve. In case the database listener port is not reachable you face potentially a firewall issue. Fri, 9 Sep 2011, Walter O. I should've clarified: I'm trying to resolve the names of other clients connected to the VPN. And don't have a problem pushing/pulling from this Linux computer to/from Github) Cheers & thx again, Riley SFO. I am not positive if this will resolve the issue or not but you might want to give it a try. Here is the step by step solution. This post quickly helps to resolve "bash: wget: command not found" error. 1 localhost localhost. I’m using third network card as NAT with DHCP so each time you restart network card or reboot host the file is overwritten with automatically generated settings. I can connect to the server via SSH, but the panel is not accessible via https. Im trying to connect to the new SAO server and it just says cant resolve host name and i know most people can get on and one other person is having this problem cna u please help me fix this? i checked the ip quite a few times but if it works tommorow witch it might becus the internet and cumputers and stuff like to be stuped like that ill say. If there is no response, try pinging 8. The rejected email address was ’[email protected] Make sure local firewalls (e. Use rpm query all command to check whether bind-utils package is installed on the server. After you issue curl, the output of the API call may be difficult to read. org'" CentOS. conf and try setting it to use 127. After doing this, I still get email complaining unable to resolve host, apparently the cause is a DNS lookup (which indeed fails, as the host-command shows - DNS lookups do not consult /etc/hosts). Today when I experienced the network issues from the development server to the repository server to get the mirror list I was actually able to get to the mirror list in my browser from another location. localhost is defined in /etc/hosts, and /etc/hosts is world readable, but I still get: LOG: could not translate host name "localhost", service "5432" to address: Name or service not known WARNING: could not create listen socket for "localhost" FATAL: could not create any TCP/IP sockets. This is not actually the answer. [mysqld] # Skip reverse DNS lookup of clients skip-name-resolve. I install WordPress and the problem appears to me. 調べてみると似たような質問がstackoverflowに載っていた。. Issues related to configuring your network. localdomain localhost6 localhost6. containers will default to using Google DNS server 8. Could not resolve host This is a DNS resolution error, which means your DNS server isn’t working properly, or you’re not getting a response correctly. 8 to resolve DNS. Thinking about your problem, you might try to use the optionalNames registry key on the domain controller. when i'm trying to ping from the client every thing working fine,but i couldnot do this from the master. So it looks like my router doesn't like wget. It appears that the hosts file located at /etc/hosts was missing an entry. Windows 7 can't resolve host names Anyone know why Windows 7 should suddenly stop resolving host names? I've had the machine working fine for ages, but all of a sudden - without anything changing as far as I know - it now won't even ping a host (immediate response of "Ping request could not find host ", even for host names in the hosts file). (Don't get me started on the fact that this should have been resolved). Provided by Samba on Linux. linux中"Could not resolve host"的问题 1、第八章 Samba服务器2、第八章 NFS服务器3、第十章 Linux下DNS服务器配站点,域名解析概念. curl: (6) Could not resolve host: google. Read this article to fix SQL Server error 53 - Could not open a connection on SQL Server (Microsoft SQL Server, Error : 53). Firefox doesn't have internet 5. Therfore, this attempt failed as well. If I do not want to switch to static IP, are there any ways to solve this? Many thanks. Make sure a local virus protection program does not block the connection. CURLE_COULDNT_RESOLVE_PROXY (5) Couldn't resolve proxy. You do, however, want to be able to connect to the lab computers using host names, but you do not have the resources to bring up your own DNS server. skip-name-resolve Solution. Other tools are able to resolve the hostname properly. host:: Name or service not known fatal: The remote end hung up unexpectedly. com gives me "ping: unknown host google. Nagios XI server could. xxx cmd it does not resolve the host name. Curl:(6) could not resolve host User Name: Linux - Newbie This Linux forum is for members that are new to Linux. localdomain4 ::1 localhost localhost. This allows me to pull the latest repository list and then modify the rpmforge. VirtualBoxのCentOS7で yum install したら Could not retrieve mirrorlist となった時の対応方法 CentOS Linux 7. OpenSSL packages were updated recently: # grep -i ssl /var/log/yum. I rebooted my server (Ubuntu 16. Whenever I 'sudo', I get 'unable to resolve host [myhostname]'. The host is a Windows machine. Git clone, ssh: Could not resolve hostname. By default, PCs and Linux workstations query the hosts file first before checking DNS, so if a value for www. Issues related to configuring your network. If that also fails, your local network configuration is wrong and you'll have to check the configuration. DNS resolution is an important service, without it functioning properly domain names will not be correctly resolved to IP addresses preventing other network services from working correctly. No such luck here. Hello Experts, After successfully installing the 12c, how can I connect to pdb to use the scott or hr schemas? By default when I connect as sys or system from sqlplus it is connecting to orcle container i. Download the package databases and update your system: sudo pacman -Syyu 2. Dear all , We are facing a problem in few of our PC that when we ping some other PC on LAN by ping -a 10. I have the same configuration at work on a RPI0, but that one seems to have auto-updated with no issue. Both should use the same "Server" for resolving names, and give the same result. centos サーバー yum update できない PYCURL ERROR 6 could't resolve host 解決 resolve. host in elasticsearch. curl: (6) Could not resolve host: google. Firefox doesn't have internet 5. For the packages under UK, I configured in Module Settings to provisioning new accounts in UK server group. ----- Our server installation is still not using TNSNAMES. org; No address associated with hostname” Netsparker Web Application Security Scanner – the only solution that delivers automatic verification of vulnerabilities with Proof-Based Scanning™. I’m using third network card as NAT with DHCP so each time you restart network card or reboot host the file is overwritten with automatically generated settings. Tagged with: /etc/resolv. conf nameserver 8. Debian Configuration :: Ssh: Could Not Resolve Hostname Apr 18, 2011. LISTEN MODE OPTIONS top. Yes it's NAT'd. I rebooted my server (Ubuntu 16. When trying to update one of my Pi-Holes to the latest web interface (nice work, btw!) I keep running into the "Could not resolve host" issue. 1) if your internet or if your internet provider h. How to enable Linux machines to resolve Windows hostnames. 事象 CentOS7をインストールした直後、yum updateをかけようとするもどうやら名前解決ができてない様子。。。 解決策 vi /etc/resolve. skip-name-resolve Solution. com’, Protocol: SMTP, Server Response: ‘550 not local host ‘todomain. conf nameserver 8. On client machine where Receiver is running, configure the DNS server to the Domain DNS server where Linux VDA resides in. Could not resolve host などと表示された時の解決方法. I | The UNIX and Linux Forums. This post quickly helps to resolve "bash: wget: command not found" error. Join 36 other followers. Provided by Samba on Linux. Any suggestion for me to accomplish my task? thanks. You might also be interested in following article : 35 Practical Examples of Linux Find Command; 20 Netstat Commands for Linux Network Management. (could have just edited resolv. Applies to: Linux OS - Version Oracle Linux 5. - JayRugMan Aug 22 at 19:28. com Browse other questions tagged linux networking domain-name. You may find you were writing [email protected] or something else similar, which would spit out this following error: ssh: Could not resolve hostname server: Name or service not known. conf but I could not resolv it for my ip address. This file is created automatically by the server. ↳ CentOS 4 - Server Support ↳ CentOS 4 - Security Support ↳ CentOS 4 - Webhosting Support ↳ CentOS 4 - X86_64,s390(x) and PowerPC Support ↳ CentOS 4 - Oracle Installation and Support ↳ CentOS 4 - Miscellaneous Questions ↳ CentOS 5 ↳ CentOS 5 - FAQ & Readme First ↳ CentOS 5 - General Support. Why would this happen in each fresh install and how to solve it?. Hi all, I have an environment consist of cluster master server windows 2008 and 5 media servers and 2 5020 appliances. One year ago, in the same lesson, I configured another server and I also have working sites on WordPress. However, you should probably not do this on a computer that you do not own or have the right to modify unless you have explicit permission to do so. Today I started to receive the. so the host name is sent to the DNS (what U got in resolv. Description of problem: If you run hostname -s on a host with a hostname that does not resolve in the DNS then you get the following error: [[email protected] COS4 ~]# hostname some. 11 Where, search domain. 0 and later had gone on to change the php version to php 5. DNS entries were missing. If pacman fails with Could not resolve host, please check your internet connection. Here is the simple fix to this problem; just add the following line into your MySQL configuration file and restart the server. org trouble on Kali Linux when run apt-get update. Unable to open PHP page that uses cURL: CONFIG_TEXT: Could not resolve host: example. Turnkey GNU/Linux is a free Debian based library of system images that pre-integrates and polishes the best free software components into secure, easy to use solutions. The documentation for the hostname command hints at the problem. I am using: (unix/Linux/Windows. containers will default to using Google DNS server 8. subversion/servers: [groups] group1 = svn. Default setup and execution of. Provided by Samba on Linux. org) _萨瓦迪卡 2018-06-01 原文 本次问题出现在虚拟机安装的centos7系统之后,使用yum命令安装wget命令(yum -y install wget),出现could not resolve host mirrorlist. Dear all , We are facing a problem in few of our PC that when we ping some other PC on LAN by ping -a 10. Both should use the same "Server" for resolving names, and give the same result. I'm able to connect to sites on the server though. 1) Last updated on AUGUST 04, 2018. I agree, but that wasn't working for me. We've been getting multiple reports lately that when trying to connect to Horizon View, random users are. It's just not an LTS (long term support) which has a commitment (in general) from canonical to release updates for 5 years for server and 3 years for desktop. The call to accept() is run in an infinite loop so that the server is always running and the delay or sleep of 1 sec ensures that this server does not eat up all of your CPU processing. Hi Stuart, Thanks for your replay. i finally got apache to restart by just renaming the php 5. ORA-12154: TNS:could not resolve the connect identifier specified Cause: A connection to a database or other service was requested using a connect identifier, and the connect identifier specified could not be resolved into a connect descriptor using one of the naming methods configured. The second part of information could technically be omitted since this entry only comes into play if the preferred DNS server encounters problems. You can help protect yourself from scammers by verifying that the contact is a Microsoft Agent or Microsoft Employee and that the phone number is an official Microsoft global customer service number. Reason unknown" Hello Evenryone, I am using Teamviewer 12 on Ubuntu 16. org; No address associated with hostname" Netsparker Web Application Security Scanner - the only solution that delivers automatic verification of vulnerabilities with Proof-Based Scanning™. conf issue, could not resolve host fix, debian, fix errors with nameservers, linux, nameserver error, no address associated with hostname fix, unix Posted in The Linux and Unix Articles!. But this ssh-copy-id is new… users feel great about this, when your environment needs to use more than one servers frequently. SOLVED: Docker build “Could not resolve ‘archive. Support for. The Interactive mode is used to query DNS-Server about various domains and hosts. Because of the broad nature of the message there are several possibilities that could. Raspberry Pi not reachable via its hostname in LAN [closed] unknown host raspberrypi If you are on a linux machine could you see what the value of hosts:. could not resolve service name. 8 from the Linux server. com -bash: host: command not found [email protected] [~]# rpm -qa | grep -i bind-utils [email protected] [~]# bind-utils package is not installed on the above server and that is the reason why host command shows not found. EAI_MEMORY Out of memory. if you don't have installed wget utility on your system. And don't have a problem pushing/pulling from this Linux computer to/from Github) Cheers & thx again, Riley SFO. conf issue, could not resolve host fix, debian, fix errors with nameservers, linux, nameserver error, no address associated with hostname fix, unix Posted in The Linux and Unix Articles!. Why would this happen in each fresh install and how to solve it?. In almost any action I do in Windows Subsystem for Linux, I get a notification "How to resolve host name". After I upgrade to Ubuntu 16. Check your DNS settings. Please note that excessive use of this feature could cause delays in getting specific content you are interested in. I added the entry and the problem went away. Further, how could it be that all unix/linux/windows/android hosts on the same network resolve the not-FQDN "server" just fine, but OSX does not? (iOS devices with 8. apt-get update Could not resolve 'http. After Installing Ubuntu 16. I could tell that the command was indeed run between the source code was copied to the remote server and the compiling started. exe” application. I have the same configuration at work on a RPI0, but that one seems to have auto-updated with no issue. If the UNIX or Linux host name is correct but the Operations Manager management server is resolving it incorrectly, either modify the DNS entry to match the correct FQDN or add an entry to the hosts file on the Operations Manager server. # service httpd start Starting httpd: httpd: apr_sockaddr_info_get() failed for dev-server httpd: Could not reliably determine the server's fully qualified domain name, using 127. If /etc/resolv. 20-106931, Guest OS's are no longer able to resolve DNS hostnames of hosts on the Host machine's local LAN when using NAT Guest network mode. stupid [[email protected] COS4 ~]# hostname some. It’s a broad message that means that your computer can’t reach the target server. 01) on both Vagrant with libvirt and VirtualBox. Welcome to Cobbler! Cobbler is a Linux installation server that allows for rapid setup of network installation environments. Hi all, I have an environment consist of cluster master server windows 2008 and 5 media servers and 2 5020 appliances. The router config hasn't changed, and I have another Mandriva box (2009 Spring) on the network that wget works just fine. Therefore it is equally important to know how to troubleshoot DNS issues on a Linux client and fix any problems to reduce disruption. This always happens after host-name changed. org': Host not found (https://svn. 1-1, pacman(5. com; sleep 1; done | tee /tmp/dnslookups. Because of the broad nature of the message there are several possibilities that could. UnknownHostException: Unable to resolve host (hostname): No address associated with hostname. I install WordPress and the problem appears to me. We do this so that more people are able to harness the power of computing and digital technologies for work, to solve problems that matter to them, and to express themselves creatively. Using cURL in PHP to access HTTPS (SSL/TLS) protected sites. 1: Name or service not known. when i'm trying to ping from the client every thing working fine,but i couldnot do this from the master. systemctl Commands should be run as the tableau user, and not as root. Howto fix couldn't resolve host on Centos Redhat RHEL Fedora, Fix issue could not resolve host on Centos Redhat RHEL Fedora, Public DNS Server on Linux. Sorry I can't help you much but, since it says "can't resolve host" try running: hostname And see if the output is the hostname of the machine. Steps to fix:. I installed agent on the linux redhat client and and i added all server list to bp. - JayRugMan Aug 22 at 19:28. So, whatever you format in your /etc/hosts file will resolve accordingly in any network action on the Linux install. To fix the problem, all you need to do is to remove the lock files. Horizon Client Cannot resolve host, yet DNS is working. 調べてみると似たような質問がstackoverflowに載っていた。. I can connect to the server via SSH, but the panel is not accessible via https. I | The UNIX and Linux Forums. Use rpm query all command to check whether bind-utils package is installed on the server. Curl:(6) could not resolve host User Name: Linux - Newbie This Linux forum is for members that are new to Linux. Git clone, ssh: Could not resolve hostname. If that also fails, your local network configuration is wrong and you'll have to check the configuration. -s host, --source host (Specify source address) Set the address for Ncat to bind to. Once complete, it should automatically update. could not resolve the connect identifier specified. For the packages under UK, I configured in Module Settings to provisioning new accounts in UK server group. [email protected] [~]# host -t A globedrill. 20-106931, Guest OS's are no longer able to resolve DNS hostnames of hosts on the Host machine's local LAN when using NAT Guest network mode. skip-name-resolve Solution. Hello everyone! Recently, I have noticed I can not use the yum command anymore. I'm able to connect to sites on the server though. It's just not an LTS (long term support) which has a commitment (in general) from canonical to release updates for 5 years for server and 3 years for desktop. 1 for ServerName To fix the above warning message, add the "ServerName" directive to the httpd. org; No address associated with hostname” Netsparker Web Application Security Scanner – the only solution that delivers automatic verification of vulnerabilities with Proof-Based Scanning™. I should've clarified: I'm trying to resolve the names of other clients connected to the VPN. Please note that excessive use of this feature could cause delays in getting specific content you are interested in. If /etc/resolv. You could cat out the contents of /etc/resolv. Unable to open PHP page that uses cURL: CONFIG_TEXT: Could not resolve host: example. ORA-12154: TNS:could not resolve the connect identifier specified Cause: A connection to a database or other service was requested using a connect identifier, and the connect identifier specified could not be resolved into a connect descriptor using one of the naming methods configured. 01) on both Vagrant with libvirt and VirtualBox. Could not open connection to the host, on port 1523: Connect failed. The “netstat” command we covered in our network troubleshooting tools article might be helpful here. It only requires the nmb. The -r option enables host to mimic the behavior of a name server by making non-recursive queries and expecting to receive answers to those queries that are usually referrals to other name servers. Not all operating systems support setting this pointer to anything other than four. When you say snapshot, I assume you mean a P2V of a Solaris host to a VM and not a VMware 'snapshot' which is something entirely different Did you convert this VM using VMware Converter into something VMware Player would understand using VMware Converter? Does the boot of the VM happen correctly? That is the first place I would look. 8 in the box next to 'preferred DNS server' and then write 8. conf file in CentOS Linux? You need to use the text editor such as vi / vim or joe make changes to /etc/resolv. I have a CentOS 7. This is simple way to fix Could not resolve ­security. 1-4) can't connect to update servers and spits out "Could not resolve host" for every server in mirrorlist. I have entered the DNS ip in /etc/resolv. cURL utility does not work on the Plesk server. subversion/servers: [groups] group1 = svn. GetHostEntry not working the same as Dns. (Never had this problem with Git on Windows 7 pushing/pulling to/from BitBucket. Use rpm query all command to check whether bind-utils package is installed on the server. We've been getting multiple reports lately that when trying to connect to Horizon View, random users are. [email protected] [~]# host -t A globedrill. 1611(Core) "Could not resolve host. If this does not resolve the issue then review the Name Management documentation to get the names matching in the environment. Very Slow DNS Lookup 7. Clear out the software packages downloaded during the aborted installation by entering the command: sudo pacman -Sc 3. could not resolve service name. How to resolve network wifi issue in Ubuntu 16. thinking_face. This is simple way to fix Could not resolve ­security. The "netstat" command we covered in our network troubleshooting tools article might be helpful here. After doing this, I still get email complaining unable to resolve host, apparently the cause is a DNS lookup (which indeed fails, as the host-command shows - DNS lookups do not consult /etc/hosts). Make sure to add the link IN THE ARTICLE, in the sections below.